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40*        40*        30-       20'        IO*         O

means a worm ^^
the wheel we ref
The points where
of friction, and c<

P. 8%. EfiE
for the experiment
A common 2-tor:
being further stij
weights, and a p


securely fastened,
a pulley E, runn
smsdl weights G t]
is held by one c^
to allow the cordL
ments of raising 5
inappreciable, ata